package com.sdy.filter;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebFilter("/admin/*")
public class LoginFilter implements Filter {
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest req=(HttpServletRequest) servletRequest;
        HttpServletResponse resp=(HttpServletResponse)servletResponse;

        Object username = req.getSession().getAttribute("username");
        if (username==null){
            resp.sendRedirect("/login.html");
            return;
        }

        filterChain.doFilter(servletRequest, servletResponse);


    }

    public void destroy() {

    }
}
